That's your opinion. For me it has been life-changing.
Besides that, I mainly use it for "watch" stuff.
That said, it is really nice to be able to get notifications without taking my phone out in certain contexts—bicycling, walking, in a pool, phone charging in other room, etc.
It does use an OLED display and we know black uses less power.
https://developer.apple.com/library/prerelease/ios/documenta...
Moreover, there is no way this watch is pulling over 24 hours battery life. They said that they expect you to charge it everyday. In that sense, the power should not be much of an issue as big as the comments here presume. LG G Watch easily lasts 24 hours, and Moto 360 easily goes 16-20 hours. So unless this watch lasts 2 days or more, screwing up the UI makes little sense, you'd be charging it every night anyway.